WO2002066869A1 - Power unit - Google Patents
Power unit Download PDFInfo
- Publication number
- WO2002066869A1 WO2002066869A1 PCT/JP2002/001436 JP0201436W WO02066869A1 WO 2002066869 A1 WO2002066869 A1 WO 2002066869A1 JP 0201436 W JP0201436 W JP 0201436W WO 02066869 A1 WO02066869 A1 WO 02066869A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- engine
- hst
- power unit
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
- F16H47/04—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the mechanical gearing being of the type with members having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
- F16H39/04—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit
- F16H39/06—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type
- F16H39/08—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type each with one main shaft and provided with pistons reciprocating in cylinders
- F16H39/10—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type each with one main shaft and provided with pistons reciprocating in cylinders with cylinders arranged around, and parallel or approximately parallel to the main axis of the gearing
- F16H39/14—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type each with one main shaft and provided with pistons reciprocating in cylinders with cylinders arranged around, and parallel or approximately parallel to the main axis of the gearing with cylinders carried in rotary cylinder blocks or cylinder-bearing members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4165—Control of cooling or lubricating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
- F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
- F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
- F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
- F16H2037/088—Power-split transmissions with summing differentials, with the input of the CVT connected or connectable to the input shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
Definitions
- the present invention relates to a power unit having a structure in which a transmission mechanism including a hydrostatic transmission is integrally mounted on an engine, and in particular, a cooling structure of a shared oil when lubricating oil and hydraulic oil used in the engine are shared.
- a transmission mechanism including a hydrostatic transmission is integrally mounted on an engine, and in particular, a cooling structure of a shared oil when lubricating oil and hydraulic oil used in the engine are shared.
- HMT hydraulic mechanical transmissions
- ATVs all terrain vehicles
- ATVs all terrain vehicles
- Mechanical transmission hereinafter referred to as “HMT”
- HMT hydrostatic transmission
- MT mechanical transmission
- HST hydrostatic transmission
- MT mechanical transmission
- the dynamic gear mechanism combines the input on the HST side and the input on the MT side to achieve a continuously variable shift.
- the HMT is provided integrally with the engine, and a power unit configured as described above is described in, for example, a publication of Japanese Patent Application Laid-Open No. 7-113454 (Patent No. 3016057).
- Methods for integrating the engine and the HMT include a method of attaching the HMT casing to the engine crankcase and fixing it, and a method of configuring the engine and the HMT in a common casing.
- the present invention has been made in view of such a problem, and its purpose is to prevent the HST from reducing efficiency and seizing when oil is shared between the engine and the HST. Is to be able to do it. Disclosure of the invention
- the common oil is cooled and then put into the HST (24) from the engine (13) side.
- a first solution taken by the present invention is to integrally provide an engine (13) and a transmission mechanism (T) including a hydrostatic transmission (24), In the power unit where the engine (13) and the hydrostatic transmission (24) are shared, oil transmission means (70, 15) for circulating the common oil between the engine (13) and the hydrostatic transmission (24), And a cooling means (40d, 77) for cooling the common oil in the oil supply path (R) to the transmission (24).
- the transmission mechanism (T) is configured by combining a hydrostatic transmission (24) with a mechanical transmission (23). It is characterized by the fact that That is, the transmission mechanism (T) is a hydraulic mechanical transmission.
- the common oil is circulated between the engine (13) and the hydrostatic transmission (24) by the oil feeding means (70, 15), and the engine (13 ) And functions as hydraulic oil for the hydrostatic transmission (24).
- the common oil whose temperature has become higher on the engine (13) side is cooled by cooling means (40d, 77) in the oil supply path (R) to the hydrostatic transmission (24). Therefore, the temperature is lower than the state on the engine (13) side, and is supplied to the hydrostatic transmission (24) in a state where the viscosity is increased.
- the third solution taken by the present invention is the first or second solution described above,
- the cooling means is constituted by a heat radiating section (40d) provided on the outer surface of the casing (40, 42) provided in the power unit ( ⁇ ), and the oil supply path (R) is connected to the heat radiating section (40d). It is characterized by being arranged along.
- the heat radiating portion (40d) can be constituted by a heat radiating fin or the like.
- the common oil is provided on the outer surface of the casing (40, 42) when flowing through the oil supply path (R) from the engine (13) to the hydrostatic transmission (24).
- the heat is dissipated in the heat dissipating part (40d) and is cooled.
- the common oil is supplied to the hydrostatic transmission (24) in a state where the temperature decreases and the viscosity increases.
- a fourth solution taken by the present invention is the first or second solution, wherein the cooling means is constituted by an oil cooler (77) provided in the oil feed path (R). It is characterized by:
- a fifth solution taken by the present invention is the first, second, third or fourth solution, wherein the oil feeding means is a charge pump (70) of the hydrostatic transmission (24). It is characterized by being composed of
- the common oil flows from the engine (13) to the hydrostatic transmission (24) by using the charge pressure of the charge pump (70) of the hydrostatic transmission (24), and Circulates between the engine (13) and the hydrostatic transmission (24).
- a sixth solution taken by the present invention is the first, second, third or fourth solution, wherein the oil supply means is constituted by a lubrication pump (15) of the engine (13). It is characterized by that
- the common oil is sent from the engine (13) to the hydrostatic transmission (24) using the lubrication pump (15) of the engine (13), so that the engine (13) Circulates between the transmission (24).
- the common oil is supplied to the hydrostatic transmission (24) in a state where the temperature is lower than the state on the engine (13) side and the viscosity is increased, so that leakage is prevented. This makes it possible to prevent power transmission efficiency from decreasing. Also, seizure of the hydrostatic transmission (24) can be prevented. Furthermore, by sharing oil, it is not necessary to provide an individual oil reservoir, and the device can be designed compact.
- the leakage of the common oil on the HST (24) side is suppressed.
- a reduction in power transmission efficiency can be reliably prevented, and seizure prevention and compactness can be achieved.
- the casing (40, 42) of the power unit ( ⁇ ) is provided with a radiator (40d) such as a radiator fin, and the oil supply path (R) is connected to the radiator (R).
- a power unit (U) that achieves the effects of the first and second solving means with a simple structure can be realized by passing the power unit (U) along 40d).
- the power unit (E) having the effects of the first and second solutions with a simple structure can be obtained. U) can be realized. Also, since the oil cooler (77) can be shared by the engine (13) and the transmission mechanism (T), the device can be made compact.
- the charge pump of the hydrostatic transmission (24) is used, and according to the sixth solution, the lubrication pump ( By using 15), it is possible to realize a power unit exhibiting the effects of each of the above-mentioned solving means without complicating the structure.
- FIG. 1 is an external view of an ATV to which a power unit according to Embodiment 1 of the present invention is applied.
- FIG. 2 is a power transmission system diagram of the ATV of FIG.
- FIG. 3 is a sectional structural view of the power unit of FIG.
- FIG. 4 is a schematic configuration diagram of the power unit of FIG.
- FIG. 5 is a schematic configuration diagram of a power unit according to Embodiment 2 of the present invention.
- FIG. 6 is a schematic configuration diagram of a power unit according to Embodiment 3 of the present invention.
- FIG. 7 is a sectional structural view of a power unit according to Embodiment 4 of the present invention.
- a power unit having an engine and an HMT, which is a transmission mechanism, is mounted on a four-wheel drive ATV.
- This power unit is configured to share the lubricating oil used for the engine and the HMT hydraulic oil.
- Fig. 1 shows the appearance of this ATV (A).
- Reference numeral (1) denotes a body composed of a pipe frame, although details are omitted, and fenders (2) and (2) are provided on the upper side of the body (1) in order from the front to the rear.
- the front cowl (3), the steering wheel (4), the fuel tank (5), the seat (driver seat) (6), and the lya cowl (8) with the left and right holders (7) and (7) are provided. ing.
- An under-force wheel (10) is provided integrally with the bumper (9) below the front cowl (3) at the frontmost portion of the vehicle body. (12), (12) are provided.
- a power train including an engine (13), an HMT (T), and an auxiliary transmission (14) is provided from below the fuel tank (5) to below the seat (6). T) is located just below sheet (6). Behind the power train, rear wheels (16), (16) are arranged on both left and right sides of the vehicle body (1) via trailing arm suspensions (not shown), respectively.
- FIG. 2 schematically shows the configuration of a power transmission path from the engine (13) of the ATV (A) to the drive wheels (12) and (16) when viewed from above the vehicle body.
- This engine (13) is mounted horizontally with the crankshaft (13a) facing the width direction of the ATV (A).
- An HMT (T) is arranged on the right side (one side in the vehicle width direction) of the engine (13) in contact with the crankcase (42).
- the transmission casing of the HMT (T) is attached to the crankcase (42) to form an integral unit, and the engine (13) and the HMT (T) constitute a power unit (U).
- the rear end of the HMT (T) is located more rearward than the rear end of the crankcase of the engine (13).
- the driven-side pepel gear (17) is provided on a drive shaft (18) extending in the vehicle front-rear direction below the vehicle body (1), and the front and rear ends of the drive shaft (18) are respectively provided. It is connected to a front wheel axle (20) and a rear wheel axle (21) via differential gears (19), (19). '
- the HMT (T) is provided on the right side of the center portion of the engine (13) in the vehicle width direction, and is located outward in the vehicle width direction in the power train.
- the above-mentioned HMT (T) divides the input rotation from the crankshaft (13a) of the engine (13) into two parts, and the mechanical transmission (MT) (23) and the hydrostatic transmission (HST) ) After being transmitted by (24), it is synthesized and output by the planetary gear mechanism of the MT (23).
- the MT (23) includes an input shaft (25) directly connected to an end of a crankshaft (13a) projecting to the right side of the vehicle body of the engine (13), and an input shaft (25).
- a planetary gear mechanism (28) which is arranged coaxially with the output shaft (26) and which receives input rotation from the input gear (27). ).
- the swash plate type axial piston pump (30) hereinafter simply referred to as piston pump
- the swash plate type axial piston motor (31) hereinafter simply referred to as motor
- the planetary gear mechanism (28) of the MT (23) includes a sun gear (34) provided integrally with the shaft (33) of the motor (31), and meshes with and surrounds the sun gear (34).
- a plurality of planetary gears (35) that revolve while rotating (only one is shown in the figure), the inner teeth of the inner circumference engage with the plurality of planetary gears (35), and the input gear (27) is mounted on the outer circumference
- a ring gear (36) formed with mating external teeth; and a planetary gear rotatably provided at one end of the output shaft (26) to rotatably support each of the plurality of planetary gears (35). Evening Lichalia (37).
- the MT (23) and the HST (24) are provided integrally with the transmission casing (40), and the transmission casing (40) is connected to the crankcase of the engine (13). (42) is attached integrally.
- the transmission casing (40) is divided by a partition wall portion (40a) into one side (the right side of the vehicle body) and the other side (the left side of the vehicle body) in the axial direction of the input shaft (25).
- the portion on the right side of the vehicle body with respect to the bulkhead (40a) is closed at its open end by an end cap (41), and the closed portion is connected to the biston pump (30) of the HST (24) and the motor (31).
- the HST storage section (40b) Further, a portion of the transmission casing (40) on the left side of the vehicle body with respect to the partition (40a) is closed by a crankcase (42), and the inside thereof is an MT housing portion for housing the MT (23). (40c).
- the input shaft (25) of the HMT (T) is formed integrally with the pump shaft of the biston pump (30).
- the integrated input shaft (25) passes through the crankcase (42) from the crankcase (42) to the bulkhead (40a) and the end cap (41) on the vehicle body front side (upper side in the figure) of the transmission casing (40), and extends in the vehicle width direction.
- And are rotatable by rolling bearings (45), (46), and (47) disposed on the crankcase (42), the partition wall (40a), and the end cap (41), respectively. Supported.
- the input shaft (25) has an original input shaft portion (25a) for receiving rotation from the crankshaft (13a) and a pump shaft having a function of a pump shaft, with a portion indicated by a virtual line C in the figure as a boundary.
- the part (25b) is a body.
- the input shaft (25) and the pump shaft may be formed separately, and they may be coupled by coupling or the like.
- the output shaft (26) of the HMT (T) is arranged on the rear side of the transmission casing (40) (the lower side in the figure) so as to extend in the vehicle width direction in parallel with the input shaft (25). I have.
- This output The shaft (26) is provided with two rolling bearings (48) provided on a cylindrical boss (42a) formed on the cover part (42b) of the crankcase (42) so as to project to the left in the figure. , (48) are rotatably supported.
- the input shaft (25) and the output shaft (26) extend in the vehicle width direction in parallel with the crankshaft (13a) of the engine (13), and are arranged in parallel at a distance from each other in the vehicle longitudinal direction. ing. Further, the output shaft (26) is located on the same axis as the shaft (33) of the motor (31), and the end of the left side of the vehicle body (the other side in the vehicle width direction) is coupled to the auxiliary transmission by a coupling (not shown). While connected to the main shaft of (14), the right end of the vehicle body (one side in the vehicle width direction) is connected to the planetary gear mechanism (37) of the planetary gear mechanism (28).
- the motor shaft (33) of the HST (24) extends in the vehicle width direction through the partition (40a) of the transmission casing (40), and extends through the partition (40a) and the end cap (41). ) Are rotatably supported by the rolling bearings (49), (50) respectively arranged in the same manner.
- the planetary gear mechanism (28) is arranged on the motor shaft (33), which penetrates through the partition (40a) and protrudes into the MT housing (40c), in the order from the partition (40a).
- a ring gear (36), a sun gear (34) and a planetary carrier (37) are provided.
- the ring gear (36) is composed of a disk-shaped plate portion (36a) rotatably disposed on a motor shaft (33) by bearings (51), (51), and a plate-shaped portion (36a).
- An annular gear portion (36b) is attached to the outer peripheral portion, and on the inner peripheral side of the gear portion (36b), internal teeth meshing with the planetary gear (35) from outside are formed. Further, external teeth are formed on the outer peripheral side to engage with the input gear (27).
- the sun gear (34) is connected to the motor shaft (33) by a spline so as to rotate integrally therewith.
- the sun gear (34) is arranged from the inside with respect to the planetary gear (35) located between the ring gear (36). ⁇ They are engaged.
- the planetary carrier (37) has a cylindrical portion (37a) which is externally inserted into the end of the output shaft (26) and is fixed integrally with the output shaft (26) by a spline.
- a relatively large-diameter enlarged portion (37b) and a disc-shaped flange (37c) are provided on one side of the cylindrical portion (37a), and the inside of the enlarged diameter portion (37b) is provided.
- the motor shaft (33) is rotatably attached to the other end of the motor shaft (33) in the vehicle width direction by a rolling bearing (52) press-fitted into the motor shaft.
- the flange (37c) of this planetary carrier (37) has a plurality of bins (53), (53), ... (only one is shown in the figure) are arranged, and the planetary gears (35) are rotatably mounted on the rolling bearings (54) fitted to the respective pins (53). Supported.
- the planetary gear mechanism (28) of the MT (23) is located on the right side of the output shaft (26) on the vehicle body and is connected to the end of the output shaft (26) on the right side of the vehicle body, while the transmission casing ( It is also connected to the shaft (33) of the motor (31) located on the right side of the vehicle body with the partition (40a) of 40) interposed therebetween.
- the motor shaft (33) is divided into a center shaft of the planetary gear mechanism (28) and the original motor shaft (33) at a position indicated by a virtual line C ′ in the figure.
- the two shafts may be connected by force coupling or the like at the relevant site.
- This biston pump (30) has a cylinder barrel (56) integrally provided on a pump shaft (25b) of an input shaft (25).
- the inside of the cylinder barrel (56) has a predetermined interval in the circumferential direction at a position on the circumference centered on the axis (X), and is long in the direction of the axis (X).
- a plurality of cylinder chambers (57), (57), ... are provided.
- One port (right side in the figure) of each cylinder chamber (57) is ported to each cylinder chamber (57) so as to open to the end face of the cylinder barrel (56) on one side in the axis direction.
- each of the cylinder chambers (57) is open at the swash plate side end face which is the other end face in the axial direction of the cylinder barrel (56), and accommodates the piston (59) in a reciprocating manner. are doing.
- a variable swash plate (60) for adjusting the reciprocating stroke of the pistons (59), (59),... Is disposed opposite to the swash plate side end surface of the cylinder barrel (56).
- the swash plate (60) holds the end of the piston (59) protruding from the cylinder chamber (57) in an abutting state as described above.
- the thrust plate (61) has two rolling bearings (62). ), (63) so that it can rotate smoothly around the axis (X) together with the piston (59), the cylinder, and the barrel (56).
- the variable swash plate (60) has a maximum inclination on both the normal rotation side and the reverse rotation side where the swash plate angle is maximum, as shown in FIG. It is configured to be tiltable between positions.
- the swash plate angle is increased or decreased by tilting by a hydraulic cylinder or a DC motor or the like.
- the input shaft (25) and cylinder barrel (56) are rotated by input from the engine (13)
- the pistons (59), (59),... reciprocate a stroke corresponding to the inclination angle of the variable swash plate (60) while revolving around the axis (X), whereby each of the pistons (59), (59),.
- Supply and discharge of hydraulic oil to and from the cylinder chamber (57) are performed.
- the piston (59) in the cylinder chamber (57) in the hydraulic oil discharge stroke, the piston (59) is pushed into the cylinder chamber (57) along the inclination of the swash plate (60), and the cylinder chamber (57) Hydraulic oil is discharged from the cylinder barrel (56) through the port (58).
- the piston (59) receives the pressure (charge pressure) of the hydraulic oil flowing into the cylinder chamber (57) through the port (58), and the swash plate (60) The cylinder is gradually pushed out of the cylinder chamber (57) along the inclination of the cylinder.
- valve plate (65) that is in sliding contact with the port-side end surface of the cylinder barrel (56).
- the valve plate (65) is closed by a pair of oil passages (66), (66) formed in the end cap (41), that is, between the hydraulic piston pump (30) and the motor (31).
- the communication state of the cylinder chambers (57), (57),... Is switched with respect to a pair of oil passages constituting the circuit (32).
- the valve blade (65) has a flat cylindrical shape as a whole, and two arc-shaped cross sections that are long in the circumferential direction of the cylinder barrel (56) so as to correspond to the respective passages (66).
- the holes (68) and (68) are provided. Then, as described above, the hydraulic oil discharged from the cylinder chambers (57), (57),... In the discharge stroke passes through one of the oil passages (68) through the one hole (68) of the valve plate (65). Hydraulic oil circulating through the other oil passage (66) while flowing through the other oil passage (66) is supplied to the cylinder chambers (57), (57), ... in the suction stroke through the other hole (68). .
- the valve plate (65) is of a floating type in which a coil spring (69) (biasing means) is pressed against the port side end surface of the cylinder barrel (56).
- the valve plate (65) is fitted with a relatively large-diameter large-diameter member (65a) having a sliding contact surface that is in sliding contact with the port-side end surface of the cylinder barrel (56), and is fitted inside the large-diameter member.
- a small cylinder member (65b) The small cylinder member (65b) is press-fitted into an annular groove provided in the end cap (41) and fixed, and the large cylinder member (65a) is loosely fitted to the small cylinder member (65b).
- the cylinder barrel (56) absorbs the dimensional error of the end cap (41), and the cylinder barrel (56)
- the sliding contact state between the port-side end face of the valve plate and the valve plate (65) can be favorably maintained.
- an O-ring or the like is provided between the large cylinder member (65a) and the small cylinder member (65b) so that the amount of hydraulic oil leak between the two members is equal to or less than a predetermined amount. I'm trying to keep it.
- a dipump (70) is provided.
- This charge pump (70) is composed of, for example, a trochoid pump.
- the common oil hydroaulic oil
- the hydraulic pump is closed.
- the oil is supplied to the lower pressure side of the pair of oil passages (66) and (66) constituting the circuit (32) through the check valves (72) and (72).
- the pressure of the hydraulic oil supplied to the low pressure side oil passage (66) is a so-called charge pressure in the hydraulic closed circuit (32), and its value is set by the pre-off valve (73).
- the hydraulic closed circuit (32) includes A pair of relief valves (74) and (74) are provided so that the hydraulic oil flows from the oil passage (66) to the low-pressure side oil passage (66).
- a bypass valve e.g., a solenoid valve for shutting off power transmission in the HST (24) by connecting the pair of oil passages (66) and (66) with each other under predetermined conditions. 75
- a bypass valve e.g., a solenoid valve for shutting off power transmission in the HST (24) by connecting the pair of oil passages (66) and (66) with each other under predetermined conditions. 75
- the bypass valve (75) is normally set to a closed position (a position shown in the drawing) in which the pair of oil passages (66) and (66) are not communicated with each other, and receives a control signal from a controller (not shown).
- the oil passages (66) can be switched to a communication position where the oil passages (66) communicate with each other.
- the bypass valve (75) has a function of a clutch that switches the HST (24) and thus the HMT (T) to a power cutoff state in which power is not transmitted.
- the input side piston pump (30) of the HS T (24) is configured as described above, while the output side motor (31) also has a fixed inclination angle of the swash plate (76). Almost the same except that Therefore, the same members as those of the piston pump (30) are denoted by the same reference numerals in this case (31), and detailed description thereof will be omitted.
- the piston pump (30) and the motor (31) are housed in the HST housing part (40b) of the transmission casing (40). Is not filled with hydraulic oil, and instead, as shown in phantom lines in FIG. 3, an orifice passageway () that opens to the inside of the HST housing (40b) on the inner wall of the end cap (41)
- a hydraulic pump is supplied to the orifice passage (80) by a charge pump (70) so as to eject a spray of lubricating oil.
- the charge pump (70) also has the function of a lubrication pump that supplies common oil to the engine (13). Specifically, the charge pump (70) is configured to send shared oil from the oil reservoir (71) to the engine (13) and then to the HST (24). In addition, a drain passage (40e) for discharging hydraulic oil is provided at the bottom of the H 2 ⁇ storage section (40b). The drain passage (40e) is connected to the engine oil reservoir (71) and returns the common oil to the reservoir (71). Therefore, the common oil is circulated between the engine (13) and the HST (24) by the charge pump (70).
- the transmission casing (40) is attached to the crankcase (42), and the engine (13) and the HMT (T) are integrated.
- oil is circulated between the engine (13) and the HST (24) so that the engine oil and the hydraulic oil of the HST (24) are shared.
- the oil supply path (R) from the engine (13) side to the HS ⁇ (24) side is a crankcase (42). ) And the transmission casing (40). Further, a radiation fin (40d) is formed on the outer surface of the transmission casing (40), and the oil supply path (R) is disposed along the radiation fin (40d).
- the radiating fins (40d) constitute a radiating portion as cooling means for cooling the common oil in the oil supply path (R) from the engine (13) side to the HST (24).
- the common oil is supplied from the oil reservoir (71) to the engine (13) and the HST (24) only by the charge pump (70) of the HST (24). May be provided with a separate lubrication pump for the engine (13) to lubricate the engine (13), and the charge pump (70) may supply oil from the engine (13) to the HST (24).
- the input shaft (25) is rotated by the operation of the engine (13) of the ATV (A), and a part of this rotating force is transmitted from the input gear (27) to the planetary gear mechanism (28) in the MT (23).
- the cylinder barrel (56) of the piston pump (30) rotates in the HST (24).
- the hydraulic oil between (31) and (31>) By supplying the hydraulic oil between (31) and (31>), a part of the torque transmitted to the input shaft (25) is transmitted to the motor (31).
- the cylinder barrel (56) of the motor (31) is rotated by receiving the supplied hydraulic oil, and the motor shaft (33) integrated with the cylinder barrel (56) is rotated.
- the force is transmitted to the sun gear (34) of the planetary gear mechanism (28) provided on the motor shaft (33).
- the rotational force transmitted to the ring gear (36) of the planetary gear mechanism (28) in the MT (23) and the rotational force transmitted to the sun gear (34) by the HS T (24) are reduced by a plurality of planetary gears.
- the signals are combined via (35), and output from the planetary carrier (37) to the output shaft (26).
- the rotation of the output shaft (26) is transmitted via the auxiliary transmission (14), the drive shaft (18) and the axles (20), (21) via the four wheels (12, (16), ...
- the common oil lubricates the engine (13) and is also sent to the HST (24) to function as HST (24) hydraulic oil.
- the common oil which has become hotter on the engine (13) side, radiates heat when flowing along the radiating fins (40d) in the oil supply path (R) to the HST (24) and is cooled. . Therefore, the common oil is supplied to the HST (24) in a state where the temperature is lower and the viscosity is higher than the state on the engine (13) side.
- the temperature of the common oil is lower than the temperature on the engine (13) side. Because it is supplied to the HST (24) in a highly viscous state, it is possible to suppress leakage, prevent a decrease in power transmission efficiency, and prevent seizure. For this reason, the power unit (U), which integrates the crankcase (42) and the transmission casing (40) and shares the lubricating oil used for the engine and the HST (24) operating oil, has Can be put to practical use without dropping.
- the charge pump (70) of the HST (24) is used to circulate the common oil between the engine (13) and the HST (24), and the radiating fins (40d) are attached to the transmission casing (40). Since the common oil is cooled by providing the common oil, circulation and cooling of the common oil can be realized with a simple structure.
- Embodiment 2 of the present invention is an example in which an oil cooler (77) is provided as cooling means for common oil.
- the oil cooler (77) is provided in the oil supply path (R) from the engine (13) to the HST (24).
- the specific structure of the power unit (U) of the second embodiment is not shown, the power unit (U) of the first embodiment is different from that of the first embodiment except that the radiation fin (40d) is not provided in the transmission casing (40). Almost the same is used.
- the supply of the common oil from the oil reservoir (71) to the engine (13) and the HST (24) uses the charge pump (70) of the HST (24) as in the first embodiment.
- the common oil is supplied to the HST (24) in a state where the temperature is lower and the viscosity is higher than the state on the engine (13) side.
- the power unit (U) that integrates the crankcase (42) and the transmission casing (40) to share the lubricating oil such as engine oil and gearwheel and the hydraulic oil of the HST (24) is used.
- the HST (24) charge pump (70) is used to circulate the common oil between the engine (13) and the HS T (24), and the oil cooler (77) is installed in the oil supply path (R). ) Is provided to cool the common oil, so that circulation and cooling of the common oil can be realized with a simple structure.
- the charge pump (70) of the HST (24) is used for the oil supply means for supplying the common oil from the engine (13) to the HST (24).
- Embodiment 3 is an example in which a lubrication pump (15) of an engine (13) is used as an oil feeding means as shown in FIG. In this figure, the lubrication pump (15) of the engine (13) is shown, but the lubrication path to the engine (13) is omitted.
- An oil cooler (77) is used as a cooling means for the common oil, as in the second embodiment.
- a radiator may be provided in the transmission casing (40) or the like as in the first embodiment, and cooling may be performed by flowing common oil along the radiator.
- the common oil is supplied to the HST (24) in a state in which the temperature is lower than that in the engine (13) and the viscosity is high, so that leakage can be suppressed.
- This makes it possible to prevent the power transmission efficiency from being reduced, and to prevent seizure.
- the crankcase (42) of the engine (13) and the transmission casing (40) of the engine (24) are integrated, and a power unit (U) that shares the lubricating oil and hydraulic oil used for the engine is used. ) Can be put to practical use. '
- the lubrication pump (15) of the engine (13) is used to circulate the common oil between the engine (13) and the HS II (24), and the oil cooler (77) is installed in the oil supply path (R). ) Is provided to cool the common oil, so the common oil can be circulated and cooled with a simple structure.
- FIG. 7 shows a power unit (U) according to Embodiment 4 of the present invention.
- a piston pump (30) and a motor (31) of the HMT (T) a cylinder barrel (56) is used as a pump shaft portion (25b) of an input shaft (25) and a motor shaft (33). ), They are connected to each other by a gap fit via a spline.
- the input gear (27) of the MT (23) is integrally formed on the input shaft (25)
- the sun gear (34) of the planetary gear mechanism (28) is integrally formed on the motor shaft (33). I have.
- valve plate (90) having a general configuration is used in place of the floating type valve plate (65) as in each of the above embodiments.
- the valve plate (90) is urged against the sliding contact plate member (91) disposed on the back surface of the end cap (41) by the coil panel (92).
- a slipper (93) and a sleeper presser (94) are used.
- the configuration in which the lubricating oil such as engine oil and gear oil used for the engine (13) is shared with the hydraulic oil of the HMT (T) and the configuration in which the shared oil is cooled are the same as those in the above embodiments.
- the charge pump (70) of the HST (24) and the lubrication pump (15) of the engine (13) are used to circulate the common oil, and the radiation fins (40d) and the oil cooler (77) are used for the common oil.
- the point used for cooling is the same as that of each of the above embodiments.
- the configuration of the other parts is substantially the same as that of the first embodiment, except for the points described particularly. Therefore, in the fourth embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
- the same operation and effect as those of the first embodiment can be obtained, and the cost can be reduced by simplifying a partial structure of the HMT (T).
- the present invention may be configured as follows in the above embodiment.
- the power unit (U) may be one in which the engine (13) and the HST (24) are integrated.
- the power unit according to the present invention can prevent a decrease in efficiency and seizure on the HST side when the oil is shared by the engine and the HST, and can be configured in a compact manner. It is suitable as a power unit of a simple ATV.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Motor Power Transmission Devices (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Control Of Fluid Gearings (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE60230015T DE60230015D1 (de) | 2001-02-19 | 2002-02-19 | Hydraulische antriebseinheit |
| EP02712464A EP1363050B1 (en) | 2001-02-19 | 2002-02-19 | Power unit |
| US10/276,251 US7051840B2 (en) | 2001-02-19 | 2002-02-19 | Power unit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001-041913 | 2001-02-19 | ||
| JP2001041913A JP2002243037A (ja) | 2001-02-19 | 2001-02-19 | 動力ユニット |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002066869A1 true WO2002066869A1 (en) | 2002-08-29 |
Family
ID=18904286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2002/001436 Ceased WO2002066869A1 (en) | 2001-02-19 | 2002-02-19 | Power unit |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7051840B2 (ja) |
| EP (1) | EP1363050B1 (ja) |
| JP (1) | JP2002243037A (ja) |
| CN (1) | CN1236216C (ja) |
| DE (1) | DE60230015D1 (ja) |
| WO (1) | WO2002066869A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7049323B2 (en) | 2003-04-25 | 2006-05-23 | Bristol-Myers Squibb Company | Amidoheterocycles as modulators of the melanocortin-4 receptor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007045178A (ja) * | 2005-08-05 | 2007-02-22 | Kanzaki Kokyukoki Mfg Co Ltd | 作業車輌 |
| US7430861B2 (en) * | 2006-08-24 | 2008-10-07 | Deere & Company | Shift controlled bypass orifice for hydrostatic transmission |
| DE102006053093A1 (de) * | 2006-11-10 | 2008-05-15 | Bomag Gmbh | Ölschmierung |
| US8056333B1 (en) | 2007-08-01 | 2011-11-15 | Hydro-Gear Limited Partnership | Pump and engine configuration |
| ATE534849T1 (de) * | 2007-10-02 | 2011-12-15 | Zahnradfabrik Friedrichshafen | Getriebevorrichtung für ein fahrzeug mit einem variator |
| WO2009047038A1 (de) * | 2007-10-02 | 2009-04-16 | Zf Friedrichshafen Ag | Leistungsverzweigungsgetriebe |
| DE102007047194A1 (de) * | 2007-10-02 | 2009-04-09 | Zf Friedrichshafen Ag | Leistungsverzweigungsgetriebe |
| WO2009047037A1 (de) * | 2007-10-02 | 2009-04-16 | Zf Friedrichshafen Ag | Hydrostatisch-mechanisches leistungsverzweigungsgetriebe |
| KR101467612B1 (ko) * | 2007-10-02 | 2014-12-01 | 젯트에프 프리드리히스하펜 아게 | 유압 피스톤 기계의 행정 체적 조절 장치 |
| CN101809331B (zh) * | 2007-10-02 | 2012-08-22 | Zf腓德烈斯哈芬股份公司 | 汽车的无级变速装置 |
| US8393988B2 (en) * | 2007-10-02 | 2013-03-12 | Zf Friedrichshafen Ag | Transmission device for a vehicle |
| DE102007047195A1 (de) * | 2007-10-02 | 2009-04-09 | Zf Friedrichshafen Ag | Verstellvorrichtung des Hubvolumens von hydraulischen Kolbenmaschinen |
| ATE533969T1 (de) * | 2007-10-02 | 2011-12-15 | Zahnradfabrik Friedrichshafen | Leistungsverzweigungsgetriebe |
| WO2009047035A1 (de) * | 2007-10-02 | 2009-04-16 | Zf Friedrichshafen Ag | Getriebevorrichtung mit einem variator |
| US20100285913A1 (en) * | 2009-05-06 | 2010-11-11 | Burjes Roger W | Transmission With Dual IVT's And Planetary Gear Set |
| DE102010003945A1 (de) * | 2009-07-15 | 2011-01-20 | Zf Friedrichshafen Ag | Getriebevorrichtung für ein Fahrzeug mit einem Gehäuse und mit wenigstens einem Variator |
| US8925311B1 (en) | 2009-07-24 | 2015-01-06 | Hydro-Gear Limited Partnership | Transmission and engine configuration |
| US9261182B2 (en) | 2011-03-31 | 2016-02-16 | Kubota Corporation | Shift power transmission apparatus and travel power transmission device |
| EP2585715B1 (en) * | 2011-08-30 | 2015-03-04 | MITSUBISHI HEAVY INDUSTRIES, Ltd. | Oil supply in renewable energy turbine generator |
| CN104727890B (zh) * | 2012-06-29 | 2017-12-15 | 常州科普动力机械有限公司 | 柴油机的润滑油路及其工作方法 |
| JP6106834B2 (ja) * | 2012-08-28 | 2017-04-05 | ダイハツ工業株式会社 | 油圧式無段変速機 |
| US9222558B2 (en) | 2012-11-05 | 2015-12-29 | The University Of Maryland Baltimore County | Geared infinitely variable transmission |
| JP6330130B2 (ja) * | 2014-01-28 | 2018-05-30 | 株式会社 神崎高級工機製作所 | アキシャルピストン装置 |
| US11137056B2 (en) * | 2018-04-13 | 2021-10-05 | Transportation Ip Holdings, Llc | Gearbox assembly |
| CN110778677B (zh) * | 2019-10-08 | 2020-08-11 | 长沙桑铼特农业机械设备有限公司 | 一种具有机械档的一体泵马达及其应用方法 |
| CN110617189B (zh) * | 2019-11-21 | 2020-04-10 | 长沙桑铼特农业机械设备有限公司 | 手自双控式一体泵马达 |
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| US6021868A (en) * | 1997-09-02 | 2000-02-08 | Eaton Corporation | Mechanical transmission cooling and lubrication using associated engine systems |
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| US4341131A (en) * | 1977-08-18 | 1982-07-27 | Sundstrand Corporation | Hydromechanical transmissions |
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- 2001-02-19 JP JP2001041913A patent/JP2002243037A/ja active Pending
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- 2002-02-19 DE DE60230015T patent/DE60230015D1/de not_active Expired - Lifetime
- 2002-02-19 EP EP02712464A patent/EP1363050B1/en not_active Expired - Lifetime
- 2002-02-19 CN CNB02800342XA patent/CN1236216C/zh not_active Expired - Fee Related
- 2002-02-19 WO PCT/JP2002/001436 patent/WO2002066869A1/ja not_active Ceased
- 2002-02-19 US US10/276,251 patent/US7051840B2/en not_active Expired - Lifetime
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| US3832980A (en) * | 1972-05-27 | 1974-09-03 | Kawasaki Heavy Ind Ltd | Combined hydraulic speed-change, cooling and lubricating system in rotary engine |
| US5085053A (en) * | 1987-12-28 | 1992-02-04 | Honda Giken Kogyo Kabushiki Kaisha | Swashplate assembly for a swashplate type hydraulic pressure device |
| JPH0321509U (ja) * | 1989-07-13 | 1991-03-04 | ||
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| US5584214A (en) * | 1993-10-19 | 1996-12-17 | Honda Giken Kogyo Kabushiki Kaisha | Transmission having a static, hydraulic continuously-variable-speed transmission mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7049323B2 (en) | 2003-04-25 | 2006-05-23 | Bristol-Myers Squibb Company | Amidoheterocycles as modulators of the melanocortin-4 receptor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE60230015D1 (de) | 2009-01-08 |
| EP1363050A1 (en) | 2003-11-19 |
| EP1363050B1 (en) | 2008-11-26 |
| CN1457411A (zh) | 2003-11-19 |
| JP2002243037A (ja) | 2002-08-28 |
| CN1236216C (zh) | 2006-01-11 |
| EP1363050A4 (en) | 2007-10-03 |
| US20030089107A1 (en) | 2003-05-15 |
| US7051840B2 (en) | 2006-05-30 |
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